spans(TIO, UTO) -> Reply

This operation returns a OverlapType depending on how the interval
in the target object and the timerange represented by the UTO object
overlap. If the OverlapType is 'OTNoOverlap' the out parameter represents
the gap between the two intervals. If OverlapType is one of the others, the
out parameter represents the overlap interval.
The definitions of the OverlapType's are:

'OTContainer' - target objects lower and upper limits are,
respectively, less or equal to and greater or equal to given object's.'OTContained' - target objects lower and upper limits are,
respectively, greater or equal to and less or equal to given object's.'OTOverlap' - target objects interval overlap given object's.'OTNoOverlap' - target objects interval do not overlap given object's.